US1611835A - Folding pencil compass - Google Patents

Description

Dec. 21 1926. 1,611,835

A. J. KEANEY FOLDING PENCIL COMPASS Filed July 8 1925 M WWINVENTOR. flz iw z A amaw,

ATTQRNEYS. I

Patented ec. l, 1926..

ALLAN J. KEANEY, OF MOUNT VERNON, NEW YORK. I

FOLDING PENCIL COMPASS.

Application filed July 8,

. This invention relates, generally, to an improved folding pencil compass; and the invention has for its principal ob ect to provide a folding pencil compass constructed and arranged in a novel manner so that one leg thereof, when not in use, maybe folded up and into the other leg, whereby the device will possess the appearance of and may be used as an ordinary pencll.

Another object of this inventionas to provide that leg of the compass which serves as the pencil element'withan adjustable lead carrying or holding means, so that the lead may serve as the marking point of the compass, and so that sald lead may be advanced or retracted to bring the marlring point in even adjusted relation to the pivot point provided by the foldable leg of the compass.

Other objects of this invention, not at this time more particularly enumerated, will be clearly understood from the following detailed description of the same. a

With the various objects of thisinvention in view, the same consists, primarily, in the novel folding pencil compass hereinafter set forth; and, the invention consists, furthermore, in the novel arrangements and combinations of the various devices and parts, as well as in the details of the construction of the same, all of which will be hereinafter more fully described, and then finally embodied in the appended claims.

The invention is clearly illustrated in the accompanying drawings, in Which:

Fig. 1 is a face view of the novel folding pencil compass in its folded condition; Fig. 2 is a side elevation of the same in its folded condition; Fig. 3 is a longitudinal section of the folding pencil compass, the same.

showing the firststep in unfolding the foldableleg thereof; Fig. 4: is a side elevation of the same with the foldable leg completely unfolded and extended ready for use; and

Fig. 5 is a transverse section, taken on line 55 in Fig. 2, saidview being drawn on an enlarged scale.

' Similar characters of reference are employed in all of the hereinabove described views to indicate corresponding parts.

Referring now to said drawings, the reference character 6 indicates the pencil leg of the compass, the same consisting of a substantially cylindrical body portion, having 1925. Serial No. 42,17?.

an extension 7 of reduced diameter at its outer or free end,'and a bifurcated opposite end 8 providing a central bearing or joint slot 9. Said body portion of the pencil leg 6 is provided witha longitudinally extending depressed seat, socket or compartment 10, which opens along the longitudinal face of the pencil leg. Rotatablv engaged upon the reduced extension 7 of the pencil leg 6 is a hollow 'lead-holding shell 11, provided with a tapered free-end portion 12 through which a pencil lead 13 maybe projected. Aflixed within the interior of said shell 11, so as to be axially alined herein, is a tubular internally screw threaded barrel 14, through the bore of which said pencil lead 13 may be advanced. The reference character 15 indicates a lead advancing plunger, the forward end of which is entered in the rearward end of said barrel 14 behind the pencil lead 13. Said plunger 15 is provided with male screw thread elements 16, which engage the internal screw threads of said barrel 14. Formed in the pencil leg body 6, in longitudinal alinement with said barrel 1-1 is an elongated socket 6, into which the rearward end-portion or tail 15' of the plunger 15 extends. The rearward extremity of said end-portion or tail 15 s provided with a flattened key-piece 15",

which serves to prevent rotation of said plunger 15 relative to the pencil leg body 6, while permitting free longitudinal movement thereof; so that upon turning the pencil leg body relative to the shell 11', said plunger 15 will turn with the former "and its male thread elements 16 caused to cooperate with the internal threads of said barrel 1d, thusproducing longitudinal advancement or retraction of the plunger relative to the barrel to advance the lead 13 or permit the retraction of the same,'as the case may be... The described, arrangement permits of easy adjustment of the pencil lead 13, as to its extent of'proj ecti on' from the free end of the shell 11. The above described pencil lead adjusting means isnot,

"per se, claimed by me, but is illustrative of one of many types of pencil lead controlling or adjustingmeans common to magazine or mechanical-pencils. So far as my present invention is concerned I merely desire to claim, broadly, a pencil lead controlling or adjusting means 111 combination with the w the respective legs thereof be so pivotally novel folding pencil compass structure which is the subject of my invention.

The foldable leg of my compass, "comprises an articulated leg element consisting of-a main leg section 17 and a foldable free end or pointed section 18. Said main leg section 17 is provided at its'u per end with a perforate hinge leaf 19, adapted to be received in thehearing or joint slot 9 of the bifurcated end 8 of the pencil leg body 6, and thereupon pivotally connected with the latter by means of suitable connection. Since it is desirable in a compass instrument. that joined as to readily maintain the positions to which they are adjusted, I have provided africtional pivot joint adapted to conveniently serve such end. This frictional pivot joint is formed by providing external seats 20 at the opposite outer faces of said bifurcated end 8 of the pencil leg body 6, the same being in parallel plane with said bearing or joint slot 9. A pivot yoke member 21 having laterally spaced washer or yokearms 22 and 23 is caused to embrace the bifurcated end 8 of the encil leg body 6, so that said washer or yo re-arms 22 and 23 respectively seat themselves in the respective seats 20. One of said washer or yoke-arms, as 23, is provided with an internally threaded perforation. so that a pivot screw 24, when passed through the opposite washer or yoke-arm 22, and thence through the interengaged bifurcated end 8 and hinge leaf 19 of the respective com ass leg portions, may be threaded into sai washer or yoke-arm 23, with the effect of drawing the interengaged parts together in'frictional embrace, whereby the compass leg portions may be swung relatively one to the other, when sufiicient force is ap lied thereto to overcome the thus establis ed friction, but will, in consequence of such established friction, tend to hold or maintain the positions to which they are thereby adjusted. The pivot yoke member 21 may be provided, at its outer end with a socket 25 adapted to hold an eraser rubber 26. as shown. It will be quite evident that the socketed eraser holding portionmay be omitted from the structure if desired, and the washer or yoke-arms 22 and 23 may be made and used in the form of independent washers.

The outlying body portion of the main leg section 17 is provided with a longitudinal slot or socket 27. Pivotally connected by the rivet 28. within the outer end of said socket or slot 27, is the-butt 29 of said foldable free end or pointed section 18. By turn-'- ing said section 1 8 on its pivotal connection, the same may be swung -or folded into the slot or socket 27 of the section 17, as illustrated in Figs. 1 to 3 inclusive of the drawings. Secured by its anchor piece'30, which is insertedwithinthe rear end of said slot or socket 27 and riveted to the section 17 is a clasp-spring 31, which extends longitudinally along one side of said slot or socket 27 above the folded in section 18. The free end of said clasp-spring 31 bears tensionally down upon the butt 29 of the section 18, thus holdin the latter yieldably retained in its in-folc ed position. Said butt 29 of the section 18 possesses a rounded kick portion 32, which, when the section 18 is out turned from the section 17 lifts the free end of the clasp-spring 31. Said kick portion 32 terminates in the outer side of the butt 2 "in a flat seat 33, at the inner end of which is a stop-shoulder 34. When the section 18 is out turned from the section 17 into unfolded or operative extended position relative to the latter, the clasp-spring 31 will bear tcnsionally upon said flat seat 33 to yieldably hold the parts in such relation, while the stop-shouder 31 will fetch up against the end of the clasp-spring, thus holding the unfolded section 18 against outward yielding and. collapse; all of which will be understood from an inspection of Fig. 4 of the drawings.

As will be evident from a reading of the accompanying drawings. the foldable leg of the pencil compass may be snugly folded into the pencil leg thereof by, first, folding the foldable section 18 into the section 17. and thereupon, in turn, swinging the section 17 into the socket or compartment 10 of the pencil leg 6, so that the foldable compass leg is flushly concealed within the latter. It w1ll be quite obvious that a very neat and compact arrangement results, whereby the device will have the appearance of and may be used as an ordinary pencil. In order to ,facilit-ate'the unfolding operations, the side of the section 17 of the foldable' leg is provided with a thumb-nail nick 35, and the pencil leg body 6 is provided with a cutaway portion or clearance notch '36. with which said nick 35 registers when the parts are folded together, so that the nick may I am aware that some changes may be made'in the general arrangements and combinations of the various devices and parts, as well as in the details of the construction of the same, without departing from the scope of this invention as described in the foregoin specification, and as defined in the appende claims. Hence, I do not limit my invention to the exact arrangements and combinations of the devices and parts as set forth in the foregoing specification, nor do I confine myself to the exact details of the construction of said parts as illustrated in the accompanying drawings.

I claim 7 l. A folding pencil compass consisting of a pencil leg having a lead holding and adjusting means at its free end, said pencil leg having an elongated socket in one side thereof; a foldable leg comprising a main section, a foldable pointed section pivoted to the outer end of said main section, said main section having a longitudinal slot into which said foldable section may be folded,

, means for retaining said foldable section extended relation to said either in folded or means for pivotall intermain section; and connecting said leg so that the latter, when its members are folded to ether, may be in turnfolded into and flushl y concealed in said side socket of said pencil leg.

2. A folding pencil compass consisting of a pencil leg having a lead holding and adjusting means at its free end, said pencil leg having an elongated socket in one side thereof; a foldable leg comprising a main section, a foldable ointed section pivoted to the outer end of said main section, said main section having a longitudinal slot into which said foldable section may be folded, means for retaining said foldable section either in folded or extended relation to said main section; means providing a friction joint for movably interconnecting said pencil leg and foldable leg together; and said foldable leg, when its members are foldable together, being movable into said side socket of said pencil leg to flushly conceal the same therein.

3. A folding pencil compass consisting of a pencil leg having a lead holding and ad-' justing means at its free end, said pencil leg having an elongated socket in one side there+ of; afoldable leg comprising .a main section having a longitudinal slot in its free end, a' pointed foldable extension pivoted to of said main section so as to the free end pencil leg and said foldable spring to hold said extension in either folded or extended relation to sand mam section; and means for pivotally tension is in folded relation thereto, may be in turn folded into and flushly concealed in said side socket of said pencil leg.

. in connection 4. A folding pencil compass consisting of a-pencil leg having a lead holding and ad- ,usting means at its free end, said pencil leg iaving an elongated socket in one side thereof; a foldable leg comprising a main section having a lon itudinal slot in its free end, a pointed foldable extension pivoted to the free end of said main sect-ion so as to fold into the slot of the latter, a claspspring secured to said main section, means with thepivoted end of said foldable extension engageable by the free end of said clasp spring to hold said extension in either folded 0r extended relation to said main section; means providing a friction joint for movably interconnecting said pencil leg and foldable leg together; and said foldable leg, when its extension is in folded relation thereto, being movable into said side socket of said'pencil leg to flushly conceal the same therein.

5. A folding pencil compass, comprising a pencil body having a longitudinal socket in its side, a foldable leg pivotall connected with said pencil body to fol into-said socket, said foldable leg having a pointed extension pivotally connected with its free end, said foldable leg also having a socket into which said pointed extension may be folded, and, means for holding said extension in either folded or extended relation to said foldable leg.

In testimony that I claim the invention set forth above I have hereunto set my hand this 3rdday of July, 1925. I

4 ALLAN J. KEANEY.

,foldable extension engageable by the free end of said clasp interconnecting said pencil leg and said foldable leg so that the latter, when its ex-

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